Nothing outlasts Energizer® Ultimate Lithium™ AAA batteries. The Energizer® Ultimate Lithium™ batteries are the #1 longest-lasting AAA batteries – complete with leak resistance and performance in extreme temperatures (-40ºF to 140ºF or -40ºC to 60ºC). To ensure your favorite devices operate at their peak performance, depend on Energizer® Ultimate Lithium™ batteries for work, play and home.